It may not be high literature, but it's close

For aspiring web designers, or those still building sites with HTML tables, Dave McFarland's new book on Cascading Style Sheets, part of the Missing Manual Series, provides the best hints, tips, tricks and solutions for this must-know technology.

This review on Slashdot is very thorough.

CSS, The Missing Manual
David Sawyer McFarland
Pogue Press/ O'Reilly